#include <stdio.h>

struct Books{
    char title[50];
    char author[50];
    char subject[100];
    int book_id;
}book={"C language","RUNOOB","programming language",123456};

int main(){
    printf("title: %s\nauthor: %s\nsubject: %s\nbook_id: %d\n",
        book.title,book.author,book.subject,book.book_id);
    return 0;
}

